Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
One day, Niiya Miyuki, a 17-year-old high school student of Japanese literature, Kadokawa Bunko, saw a man on a packed train on his way to school who was stabbed with a knife. From that day, something started to move around her. "Why don't you kill her?" One phone call came to her house, and her heart shook because she hated her mother strongly for a certain reason. The phone call came from the same 17-year-old girl, Tadokoro Sachiko. She was also a girl who had an intention to kill her stepmother and approached herself as a "killer". This is a long youth mystery that depicts the strange friendship between two high school girls and their delicate, swaying hearts.